ITS 25 POINTS AND WILL GIVE An experimental electrical system has a voltage that can be modeled by V(t) = 0.4t3 + 6.4t2 + 6t, where t represents time in seconds. The resistance in the system also varies and can be modeled by R(t) = t + 1. The current I is related to voltage and resistance by the equation I = V/R
. Write an expression that represents the current in the system.

The expression that represents the current in the system is

15 points ! ~ see if you know the answer to both you!

The hawaiian alphabet has 12 letters. how many permutations are posible for each number of letters?

Recall that the owner of a local health food store recently started a new ad campaign to attract more business and wants to know if average daily sales have increased. historically average daily sales were approximately $2,700. the upper bound of the 95% range of likely sample means for this one-sided test is approximately $2,843.44. if the owner took a random sample of forty-five days and found that daily average sales were now $2,984, what can she conclude at the 95% confidence level?